A Mig Welder joins metal components by applying the MIG (Gas Metal Arc Welding) welding process, which involves using a continuously fed wire electrode, shielding gas, and an electric arc to fuse pieces together. Responsibilities include interpreting technical drawings, preparing materials, operating and maintaining welding equipment, inspecting finished welds for quality, and adhering to safety protocols. MIG welders often work in manufacturing, construction, and automotive industries, collaborating with teams to meet project specifications and deadlines.